Final answer:
Matias needs a total of 0.88 kilograms of ice for his project.
Step-by-step explanation:
To find the total kilograms of ice Matias needs for his project, we need to add the mass of dry ice and regular ice together. Given that Matias needs 0.33 kilogram of dry ice and 0.55 kilogram of regular ice, we can add these two quantities to get the total amount of ice needed.
0.33 kg + 0.55 kg = 0.88 kg
Therefore, Matias needs a total of 0.88 kilograms of ice for his project.